I’ll mark you brainlist

Let r = 3. what is the value of r + 58?

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%